public class Example5_3 {
  public static void main(String args[]) {
     CheapGoods cheapGoods=new CheapGoods();
     cheapGoods.newSetWeight(198);
     System.out.println("对象cheapGoods的weight的值是:"+cheapGoods.weight);
     System.out.println("cheapGoods用子类新增的优惠方法计算价格："+
                         cheapGoods.newGetPrice());
     cheapGoods.oldSetWeight(198.987); 
     System.out.println("cheapGoods使用继承的方法（无优惠）计算价格："+cheapGoods.oldGetPrice());
  }
} 
